Offline address book will not update

Any assistance would be much appreciated! I have the same question 1. Report abuse. Details required :. Cancel Submit. Hi Zac French, Greetings. Kind Regards, Betty. How satisfied are you with this reply? Thanks for your feedback, it helps us improve the site. Hi Betty, Thanks for coming back to me so quickly! Outlook version:. Hi Zac, Is there any update to share with me? The version on the server and the version on the client do not match.

There is a more recent version of the offline address book present on the server. For example, Version 3a Unicode offline address book is now available, and you previously downloaded a Version 2 offline address book. Applying changes to the offline address book failed. For example, differential files are corrupted on the server.

Corruption may occur if the server goes down during differential file generation. A change to the legacyDN table occurred. One or more offline address book files were not present on the client computer. For example, a user accidentally deletes one of the. Note Outlook will not perform a full download if there is a disk-space problem on the client computer.

This restriction helps safeguard the network against excessive downloads. Q Is there any compression of the data during an offline address book download?

A To save bandwidth, the offline address book is compressed to less than one-third of its full size during the download. You can see the full offline address book files by using Outlook Web Access with a URL that is similar to the following:. If there are user certificates in the offline address book, this will add approximately 1 KB per certificate. Q Outlook shows the "Updating Address Book" status for a long time.

A Outlook has a throttling feature that slows the address book update when you are working in Outlook. Outlook is helping you complete other activities and does not allow the address book update to interfere. A In computers with slow hard disk drives, such as some earlier portable computers, the process of updating the address book can slow down the computer if the hard disk is fragmented. To improve offline address book download performance, try defragmenting your hard disk.

In fact, Outlook cached mode will continue to download the offline address book every 24 hours regardless of whether the option is enabled. Note To locate this option, follow these steps for your version of Outlook: Outlook or later versions:. When you click to select the Download offline address book check box and then click Address Book Settings , the Offline Address Book dialog box appears.

In this dialog box, you can specify either No Details or Full Details. These settings affect the offline address book download. For example, if you select No Details , a no-details version will be automatically downloaded to your computer during an offline address book download.

Q How can I determine whether my client is performing a full offline address book download? A To have Outlook display a dialog box that prompts you before the offline address book download starts, follow these steps.

Type 1, and then click OK. Set this value to 1 to display the prompt. Set it to 0 to not display the prompt. When Outlook starts the offline address book download, a dialog box prompts you to select whether you want to perform a full download. If you click No , Outlook will prompt you again after one hour. However, Outlook only deletes the offline address book files that belong to the current profile.

If you create a new Unicode profile, you may still see some old ANSI offline address book files if these files are associated with another Outlook profile. Q How can I indicate that I want exact alias matching with the offline address book? A When you use Outlook in cached mode, a registry setting controls how names are matched to the offline address book.

By default, name fragments are matched to all naming fields, not just to the e-mail alias. For example, the following table contains examples of how names are resolved in Outlook in cached mode. If you type bobb in an Address field, Outlook resolves "bobb" to both entries in cached mode.

You can indicate that you want an exact match for an e-mail alias by typing an equal sign before the e-mail alias text. If you are using Outlook in cached mode, you can turn on exact e-mail alias matching without having to use the equal sign.

To use this function, follow these steps. Click Start , click Run , type regedit, and then click OK. Setting this value to 1 enables exact matching. A The offline address book supports name resolution indexes against the following properties only:.

Conversely, Active Directory is configurable. Your administrator can set the server to resolve names against any set of properties. If Active Directory had the display name set to "Lastname, Firstname," the following values would be indexed for the properties in the sample user information:.

In this configuration, you cannot find this user if you type "Marcelo. If installing SP2 is not an option, you must perform additional steps for non-SP2 clients. For more information, click the following article number to view the article in the Microsoft Knowledge Base:. This can reduce the effectiveness of cached mode because Outlook must have the global catalog server to resolve names.

Q I cannot resolve proxy addresses now. If these fields do not meet your requirements, you can force Outlook to resolve proxy addresses. Please see the details in article for additional information. Q Can I add a custom property to the offline address book? You cannot add custom properties directly to the offline address book.

This can cause remote procedure call RPC traffic to the server and can cause delays if these properties are published to the General tab. We recommend that you add these custom properties to alternative tabs. For more information about resolving custom properties when using Outlook, click the following article number to view the article in the Microsoft Knowledge Base:.

Can I use two cached profiles with their own offline address books? Outlook supports only one offline address book per user account on a computer. If you have multiple profiles, only one profile can download the offline address book.

If you have to use two cached mode profiles, make sure that one of the profiles does not download the offline address book. For more information about how to disable the Outlook Address Book download for a cached mode profile, click the following article number to view the article in the Microsoft Knowledge Base:.

A To determine whether Outlook is using a downloaded offline address book or the global address list, follow these steps:. Privacy policy. Thank you. For information about the parameter sets in the Syntax section below, see Exchange cmdlet syntax. You need to be assigned permissions before you can run this cmdlet. Although this topic lists all parameters for the cmdlet, you may not have access to some parameters if they're not included in the permissions assigned to you. To find the permissions required to run any cmdlet or parameter in your organization, see Find the permissions required to run any Exchange cmdlet.

The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on if the cmdlet requires confirmation before proceeding.

A benefit of manually deleting the oab-file is that before they are being re-downloaded, you are working with the Online Address Book. When you find things working correctly for you now but not anymore after the oab-files were redownloaded, you know that the issue is with the oab-files on the server and not on the client or the Address Book configuration in general.

When making a change to a mail recipient like the email address or the display name of the user or even update the parameters of an Offline Address Book on the Exchange server via Exchange Management Shell PowerShell , updating the Outlook client after that will not directly get you a fully up-to-date copy. By default. More info: Change the offline address book generation schedule in Exchange Microsoft Docs. Rather than changing the default schedule, you can also force an update of the Offline Address Book when using Exchange On-Premises.

This is great for testing or when it is important that changes are published immediately. Properly managing and troubleshooting the Offline Address Book can be quite complex.

The above examples on how to modify the generation schedule and force an update only just scratches the surface. Default generation schedule: 8 hours. Outlook downloads the OAB. Default update schedule when leaving Outlook running: 24 hours. Updating Outlook manually Even though Outlook is the last in the chain, it is often the first level where the troubleshooting takes place as usually this is where the request is coming from.

Select your Exchange account and enable the option: Include the selected account in this group.